I recently migrated from an old HDD to an SSD drive weeks ago, and thought I had backed up all files needed to keep my modifications from EVP4, using the .gvp file in the Sound folder of FSX. However, I found out that I couldn't see all of my modifications in the EVP panel, and therefore couldn't change anything. I also found out that I could hear the wavefiles while using the modified .gvp file I backed up, in FSX. My question is - Can I extract the raw wav files from the .gvp file to re-create the .evp modifications I had, or share it with the community? I didn't want to remake the whole modifications all over again...

I really don't know what to do, other than to go to a technician and see if, in the old HDD drive, I still have my old files in the "Program Data" folder (which I only recently discovered I had to backup files from there too ). If convenient, I can send the .gvp file to you.

Ok, bad to hear, guess I'll head for the technician and try to recover the data... If unable, it's a lot of work I'll have to remake

Other than that, can you still use the same voice speed settings when updating the voicepack with new modifications? I.e. when changing to faster speed settings, will all wav files change to the same speed or will my modifications be even faster than the default ones (due to an additive effect)?

Either EditVoicepack will fail updating as the recordings no longer match what it needs to build the modifications, or it will simply rebuild the file ignoring all your existing content - it depends on what exactly was done.